Hash Digest

Abstract

---

• The output value produced by a Hash Function, commonly formatted as hex or Base 64 Encoding
• It is infeasible to reverse back the original text with the hash digest only

Vulnerable to Brute-force attacks

Can by hacked by Rainbow table - Wikipedia. You can try to hash of common text and hack using this website

One way to counter it is to use Salting

Generate Hash Digest using Nodejs

const { createHash } = require('crypto')
 
function hash(input) {
  return createHash('sha256').update(input).digest("hex")
}
 
let password = 'password123'
console.log(hash(password));

Example use case

Store secrete data in plaintext in the hash form (e.g Password)

Common Hash Algorithms

---

MD5 (Message Digest)

• A Hashing Algorithm that can be broken

SHA256 (Secure Hash Algorithm)

• A Hashing Algorithm that produces a fix length of Digest that is 256-bits

# Output is hex encoded
shasum -a 256 <FILE_NAME>